<template>
	<div class="sc-upload-avatar" :class="{ 'sc-upload-avatar-round': round }" :style="style">
		<div v-if="file && file.status != 'success'" class="sc-upload__uploading">
			<div class="sc-upload__progress">
				<el-progress :percentage="file.percentage" :text-inside="true" :stroke-width="16" />
			</div>
			<el-image class="image" :src="file.tempFile" fit="cover"></el-image>
		</div>
		<div v-if="file && file.status == 'success'" class="sc-upload__img">
			<el-image class="image" :src="file.url" :preview-src-list="[file.url]" fit="cover" hide-on-click-modal
				append-to-body :z-index="9999">
				<template #placeholder>
					<div class="sc-upload__img-slot">Loading...</div>
				</template>
			</el-image>
			<div class="sc-upload__img-actions" v-if="!disabled">
				<span class="del" @click="handleRemove()"><el-icon><el-icon-delete /></el-icon></span>
			</div>
		</div>
		<el-upload v-if="!file" class="uploader" ref="uploader" :auto-upload="cropper ? false : autoUpload"
			:disabled="disabled" :show-file-list="showFileList" :action="action" :name="name" :data="data" :accept="accept"
			:limit="1" :http-request="request" :on-change="change" :before-upload="before" :on-success="success"
			:on-error="error" :on-exceed="handleExceed">
			<slot>
				<div class="el-upload--picture-card">
					<div class="file-empty">
						<el-icon>
							<component :is="icon" />
						</el-icon>
						<h4 v-if="title">{{ title }}</h4>
					</div>
				</div>
			</slot>
		</el-upload>
		<span style="display: none !important"><el-input v-model="value"></el-input></span>
		<el-dialog title="剪裁" draggable v-model="cropperDialogVisible" :width="580" @closed="cropperClosed"
			destroy-on-close>
			<sc-cropper :src="cropperFile.tempCropperFile" :compress="compress" :aspectRatio="aspectRatio"
				ref="cropper"></sc-cropper>
			<template #footer>
				<el-button @click="cropperDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="cropperSave">确 定</el-button>
			</template>
		</el-dialog>
	</div>
</template>

<script>
import { defineAsyncComponent } from "vue";
import { genFileId } from "element-plus";
const scCropper = defineAsyncComponent(() => import("@/components/scCropper"));
import config from "@/config/upload";

export default {
	props: {
		modelValue: { type: String, default: "" },
		height: { type: Number, default: 148 },
		width: { type: Number, default: 148 },
		title: { type: String, default: "" },
		icon: { type: String, default: "el-icon-plus" },
		action: { type: String, default: "" },
		apiObj: { type: Object, default: () => { } },
		name: { type: String, default: config.filename },
		data: { type: Object, default: () => { } },
		accept: { type: String, default: "image/gif, image/jpeg, image/png" },
		maxSize: { type: Number, default: config.maxSizeFile },
		limit: { type: Number, default: 1 },
		autoUpload: { type: Boolean, default: true },
		showFileList: { type: Boolean, default: false },
		disabled: { type: Boolean, default: false },
		round: { type: Boolean, default: false },
		onSuccess: {
			type: Function,
			default: () => {
				return true;
			},
		},
		cropper: { type: Boolean, default: false },
		compress: { type: Number, default: 1 },
		aspectRatio: { type: Number, default: NaN },
	},
	components: {
		scCropper,
	},
	data() {
		return {
			value: "",
			file: null,
			style: {
				width: this.width + "px",
				height: this.height + "px",
			},
			cropperDialogVisible: false,
			cropperFile: null,
		};
	},
	watch: {
		modelValue(val) {
			this.value = val;
			this.newFile(val);
		},
		value(val) {
			this.$emit("update:modelValue", val);
		},
	},
	mounted() {
		this.value = this.modelValue;
		this.newFile(this.modelValue);
	},
	methods: {
		newFile(url) {
			if (url) {
				this.file = {
					status: "success",
					url: url,
				};
			} else {
				this.file = null;
			}
		},
		cropperSave() {
			this.$refs.cropper.getCropFile(
				(file) => {
					file.uid = this.cropperFile.uid;
					this.cropperFile.raw = file;

					this.file = this.cropperFile;
					this.file.tempFile = URL.createObjectURL(this.file.raw);
					this.$refs.uploader.submit();
				},
				this.cropperFile.name,
				this.cropperFile.type
			);
			this.cropperDialogVisible = false;
		},
		cropperClosed() {
			URL.revokeObjectURL(this.cropperFile.tempCropperFile);
			delete this.cropperFile.tempCropperFile;
		},
		handleRemove() {
			this.clearFiles();
		},
		clearFiles() {
			URL.revokeObjectURL(this.file.tempFile);
			this.value = "";
			this.file = null;
			this.$nextTick(() => {
				this.$refs.uploader.clearFiles();
			});
		},
		change(file, files) {
			if (files.length > 1) {
				files.splice(0, 1);
			}
			if (this.cropper && file.status == "ready") {
				const acceptIncludes = [
					"image/gif",
					"image/jpeg",
					"image/png",
				].includes(file.raw.type);
				if (!acceptIncludes) {
					this.$notify.warning({
						title: "上传文件警告",
						message: "选择的文件非图像类文件",
					});
					return false;
				}
				this.cropperFile = file;
				this.cropperFile.tempCropperFile = URL.createObjectURL(
					file.raw
				);
				this.cropperDialogVisible = true;
				return false;
			}
			this.file = file;
			if (file.status == "ready") {
				file.tempFile = URL.createObjectURL(file.raw);
			}
		},
		before(file) {
			const acceptIncludes = this.accept
				.replace(/\s/g, "")
				.split(",")
				.includes(file.type);
			if (!acceptIncludes) {
				this.$notify.warning({
					title: "上传文件警告",
					message: "选择的文件非图像类文件",
				});
				this.clearFiles();
				return false;
			}
			const maxSize = file.size / 1024 / 1024 < this.maxSize;
			if (!maxSize) {
				this.$message.warning(
					`上传文件大小不能超过 ${this.maxSize}MB!`
				);
				this.clearFiles();
				return false;
			}
		},
		handleExceed(files) {
			const file = files[0];
			file.uid = genFileId();
			this.$refs.uploader.handleStart(file);
		},
		success(res, file) {
			var response = config.parseData(res);
			file.url = response.src;
			this.value = file.url;

			//释放内存删除blob
			URL.revokeObjectURL(file.tempFile);
			delete file.tempFile;
		},
		error(err) {
			this.$nextTick(() => {
				this.clearFiles();
			});
			this.$notify.error({
				title: "上传文件未成功",
				message: err,
			});
		},
		request(param) {
			var apiObj = config.apiObj;
			if (this.apiObj) {
				apiObj = this.apiObj;
			}
			const data = new FormData();
			data.append(param.filename, param.file);
			for (const key in param.data) {
				data.append(key, param.data[key]);
			}
			apiObj
				.post(data, {
					onUploadProgress: (e) => {
						const complete = parseInt(
							((e.loaded / e.total) * 100) | 0,
							10
						);
						param.onProgress({ percent: complete });
					},
				})
				.then((res) => {
					var response = config.parseData(res);
					if (response.code == config.successCode) {
						param.onSuccess(res);
					} else {
						param.onError(response.msg || "未知错误");
					}
				})
				.catch((err) => {
					param.onError(err);
				});
		},
	},
};
</script>

<style scoped>
.el-form-item.is-error .sc-upload-avatar .el-upload--picture-card {
	border-color: var(--el-color-danger);
}

.sc-upload-avatar .el-upload--picture-card {
	border-radius: 0;
}

.sc-upload-avatar .uploader,
.sc-upload-avatar:deep(.el-upload) {
	width: 100%;
	height: 100%;
}

.sc-upload__img {
	width: 100%;
	height: 100%;
	position: relative;
}

.sc-upload__img .image {
	width: 100%;
	height: 100%;
}

.sc-upload__img-actions {
	position: absolute;
	top: 0;
	right: 0;
	display: none;
}

.sc-upload__img-actions span {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 25px;
	height: 25px;
	cursor: pointer;
	color: #fff;
}

.sc-upload__img-actions span i {
	font-size: 12px;
}

.sc-upload__img-actions .del {
	background: #f56c6c;
}

.sc-upload__img:hover .sc-upload__img-actions {
	display: block;
}

.sc-upload__img-slot {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 100%;
	height: 100%;
	font-size: 12px;
	background-color: var(--el-fill-color-lighter);
}

.sc-upload__uploading {
	width: 100%;
	height: 100%;
	position: relative;
}

.sc-upload__progress {
	position: absolute;
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	background-color: var(--el-overlay-color-lighter);
	z-index: 1;
	padding: 10px;
}

.sc-upload__progress .el-progress {
	width: 100%;
}

.sc-upload__uploading .image {
	width: 100%;
	height: 100%;
}

.sc-upload-avatar .file-empty {
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
}

.sc-upload-avatar .file-empty i {
	font-size: 28px;
}

.sc-upload-avatar .file-empty h4 {
	font-size: 12px;
	font-weight: normal;
	color: #8c939d;
	margin-top: 8px;
}

.sc-upload-avatar.sc-upload-avatar-round {
	border-radius: 50%;
	overflow: hidden;
}

.sc-upload-avatar.sc-upload-avatar-round .el-upload--picture-card {
	border-radius: 50%;
}

.sc-upload-avatar.sc-upload-avatar-round .sc-upload__img-actions {
	top: auto;
	left: 0;
	right: 0;
	bottom: 0;
}

.sc-upload-avatar.sc-upload-avatar-round .sc-upload__img-actions span {
	width: 100%;
}
</style>
